linux-toradex.git/fs/9p/vfs_file.c, branch v3.0.7

fs/9p: Use protocol-defined value for lock/getlock 'type' field.

2011-10-03T18:40:22+00:00

commit 51b8b4fb32271d39fbdd760397406177b2b0fd36 upstream.

Signed-off-by: Jim Garlick 
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Harsh Prateek Bora 
Signed-off-by: Greg Kroah-Hartman

fs/9p: Add OS dependent open flags in 9p protocol

2011-10-03T18:40:21+00:00

commit f88657ce3f9713a0c62101dffb0e972a979e77b9 upstream.

Some of the flags are OS/arch dependent we add a 9p
protocol value which maps to asm-generic/fcntl.h values in Linux
Based on the original patch from Venkateswararao Jujjuri 

[extra comments from author as to why this needs to go to stable:

Earlier for different operation such as open we used the values of open
flag as defined by the OS.  But some of these flags such as O_DIRECT are
arch dependent. So if we have the 9p client and server running on
different architectures, we end up with client sending client
architecture value of these open flag and server will try to map these
values to what its architecture states. For ex: O_DIRECT on a x86 client
maps to

#define O_DIRECT        00040000

Where as on sparc server it will maps to

#define O_DIRECT        0x100000

Hence we need to map these open flags to OS/arch independent flag
values.  Getting these changes to an early version of kernel ensures us
that we work with different combination of client and server. We should
ideally backport this patch to all possible kernel version.]

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Harsh Prateek Bora 
Signed-off-by: Greg Kroah-Hartman

9p: use the updated offset given by generic_write_checks

2011-03-22T21:32:49+00:00

Without this fix, even if a file is opened in O_APPEND mode, data will be
written at current file position instead of end of file.

Signed-off-by: M. Mohan Kumar 
Reviewed-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: Attach writeback_fid on first open with WR flag

2011-03-22T20:43:36+00:00

We don't need writeback fid if we are only doing O_RDONLY open

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Fix race in initializing writeback fid

2011-03-22T20:43:35+00:00

When two process open the same file we can end up with both of them
allocating the writeback_fid. Add a new mutex which can be used
for synchronizing v9fs_inode member values.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Add direct IO support in cached mode

2011-03-15T14:57:40+00:00

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Fix inode i_size update in file_write

2011-03-15T14:57:40+00:00

Only update inode i_size when we write towards end of file.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Move writeback fid to v9fs_inode

2011-03-15T14:57:39+00:00

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Add buffered write support for v9fs.

2011-03-15T14:57:37+00:00

We can now support writeable mmaps.
Based on the original patch from Badari Pulavarty 

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen

fs/9p: Add fid to inode in cached mode

2011-03-15T14:57:37+00:00

The fid attached to inode will be opened O_RDWR mode and is used
for dirty page writeback only.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Venkateswararao Jujjuri 
Signed-off-by: Eric Van Hensbergen